Someone registered using my ID number

I tried to signup for Betway account but i noticed that someone has already registered using my ID number so i went on a Live chat and was assisted by Lindiwe. Told her my story, she asked if I haven't used this number before ***, and i told her in my life i only had 1 number since 2005 and that is *** and the she told me that my matter should be solved within 72 hours. Yesterday i received a call from Tebogo and i told him the same story and he said he will escalate my matter. Later yesterday i recieved an SMS that reads "Betway.Please re-register a new Betway Account as you I.D reactivation request has been completed. Regards Betway" Today when i try to re-register it says "Account already exists" .

I don't know what do now, I'm defeated!